Calculate distances from the epicenter to stations A, B, and C in Fig. 8.45 in Text using Table 8.2 er 8Structural Deformation of the Earth's Crust and EarthquakesStation CStation BSeismogram forstation A25Curves show how20travel times ofP and S wavesincrease withdistance1510-Travel timeof P wave fromearthquake tostation C200040006000800010,000Distance from earthquake (km)A FIGURE 8.45Variation of the S-P time interval with distance from the epicenter. As the distance from the epicenterincreases from seismograph station X, to Xc, the S-P time interval increases. Source: From F. Press andR. Siever, Earth, 3rd ed., © 1982 by W. H. Freeman and Co., San Francisco.Time after start of earthquake (min}Surface waves|interval Table 8.2 Travel Time and Time Interval for Arrival of Seismic WavesDistanceTime (S-P)km 500 --50 sec40Interval300-30between P200 -20Travel Timeand S (S-P)100 --10Distance from75-8.source, kmminminminS506-42,0004,0006,0008,00010,00011,0004067253196.5812363825-20-210-5-9.211656735112320459.22125723561059133925181139Source: From S. Judson, M. E. Kauffman, and L. D. Leet, Physical Geology, 7th ed., © 1987 by Prentice Hall, Inc.,Englewood Cliffs, N.J.

Epicenter means to determine the distance of an earthquake. Between the arrivals times of p wave and…

Answered: Calculate distances from the epicenter…

Engineering

Civil Engineering

Calculate distances from the epicenter to stations

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Control Survey and Geodetic reductions

Control surveys or survey controls are used to establish reference points as a basis for various construction activities. Vertical and horizontal control points are to be established in a control survey to increase accuracy. After establishing the control points, all other types of surveys such as topographic, right-of-way, aerial mapping, construction layout, boundary surveys, and utility mapping can be worked upon so that control networks can be formed. The place from which the observations are made is called a survey station.

Question

Calculate distances from the epicenter to stations A, B, and C in Fig. 8.45 in Text using Table 8.2

er 8
Structural Deformation of the Earth's Crust and Earthquakes
Station C
Station B
Seismogram for
station A
25
Curves show how
20
travel times of
P and S waves
increase with
distance
15
10-
Travel time
of P wave from
earthquake to
station C
2000
4000
6000
8000
10,000
Distance from earthquake (km)
A FIGURE 8.45
Variation of the S-P time interval with distance from the epicenter. As the distance from the epicenter
increases from seismograph station X, to Xc, the S-P time interval increases. Source: From F. Press and
R. Siever, Earth, 3rd ed., © 1982 by W. H. Freeman and Co., San Francisco.
Time after start of earthquake (min}
Surface waves
|interval

Table 8.2 Travel Time and Time Interval for Arrival of Seismic Waves
Distance
Time (S-P)
km 500 -
-50 sec
40
Interval
300-
30
between P
200 -
20
Travel Time
and S (S-P)
100 -
-10
Distance from
75-
8.
source, km
min
min
min
S
506
-4
2,000
4,000
6,000
8,000
10,000
11,000
4
06
7
25
3
19
6.
58
12
36
38
25-
20-2
10-
5-
9.
21
16
56
7
35
11
23
20
45
9.
22
12
57
23
56
10
59
13
39
25
18
11
39
Source: From S. Judson, M. E. Kauffman, and L. D. Leet, Physical Geology, 7th ed., © 1987 by Prentice Hall, Inc.,
Englewood Cliffs, N.J.

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